Patterns to make your own Maritime Radio Room 12 hour clock. Files from Dan Zeitlan, K2YWE and David J. Ring, Jr., N1EA. N1EA's files are vector artwork which can be opened in vector art program or PDF reader.
The K2YWE clock is sized in the pdf for the Ikea RUSCH clock, which is currently 1.99 USD online. (Early 2018)
There is also a file called marclock.pdf which is a typical marine clock of the same type as the Radio Room clock, but without the silent period sectors of red, or red and green. Use this if you just want a maritime type clock.